Enable text based alternatives for graph display and drawing entry

Try Another Version of This Question

Suppose that z  varies jointly with x  and y .

Find the constant of proportionality k  if z = 48  when y = 3  and x = 2 .
k =

Using the k  from above write the variation equation in terms of x  and y .
z =

Using the k  from above find z  given that y = 9  and x = 4 .
z =

If needed, round answer to 3 decimal places.
Enter DNE for Does Not Exist, oo for Infinity